Plant now for spring harvest! $5 per 1/4 # (approx. 50 onions) These onion plants are called “sets” which are mini dried onions about the size of pearl onions. Space 2″ apart in rows, rows 8″ apart, plant the pointy end (or sprouted end) UP, with the top about an inch below the surface of the soil. As onions grow, you can thin them out to a 4″ spacing, using the green onions as Spring Onions. Onions will begin to bulb in April. Sweet Vidalia type.